可以使用cat powershell命令。

首先创建一个包含几个字符的简单文本文件。输入的初始字符越多，它变大的速度就越快。调用out。txt。然后在Powershell中:

cat out.txt >> out.txt

等待足够长的时间，使文件足够大。然后按ctrl-c结束它。

可以使用cat powershell命令。

首先创建一个包含几个字符的简单文本文件。输入的初始字符越多，它变大的速度就越快。调用out。txt。然后在Powershell中:

cat out.txt >> out.txt

等待足够长的时间，使文件足够大。然后按ctrl-c结束它。

另一个GUI解决方案:WinHex。

“File” > “New” > “Desired file size” = [X]
“File” > “Save as” = [Name]

与一些已经提出的解决方案相反，它实际上是在设备上写入(空)数据。

它还允许用可选择的模式或随机数据填充新文件:

“Edit” > “Fill file” (or “Fill block” if a block is selected)

临时文件应该存储在Windows临时文件夹中。根据Rod的回答，您可以使用下面的一行代码创建一个5 GB的临时文件，该文件返回文件名

[System.IO.Path]::GetTempFileName() | % { [System.IO.File]::Create($_).SetLength(5gb).Close;$_ } | ? { $_ }

解释:

[System.IO.Path]::GetTempFileName() generates a random filename with random extension in the Windows Temp Folder The Pipeline is used to pass the name to [System.IO.File]::Create($_) which creates the file The file name is set to the newly created file with .SetLength(5gb). I was a bit surprised to discover, that PowerShell supports Byte Conversion, which is really helpful. The file handle needs to be closed with .close to allow other applications to access it With ;$_ the filename is returned and with | ? { $_ } it is ensured that only the filename is returned and not the empty string returned by [System.IO.File]::Create($_)

在C:\Temp中创建一个文件来填充磁盘C:只留下10 MB:

[io.file]::Create("C:\temp\bigblob.txt").SetLength((gwmi Win32_LogicalDisk -Filter "DeviceID='C:'").FreeSpace - 10MB).Close

．.． 在几秒钟内生成1mb文件dummy.txt。

echo "This is just a sample line appended to create a big file.. " > dummy.txt 
for /L %i in (1,1,14) do type dummy.txt >> dummy.txt

请看这里:http://www.windows-commandline.com/how-to-create-large-dummy-file/